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Explanation: Case: long, narrow table; Du: documents. There is no backlog of documents on the table. Describe the transaction of official business in a timely manner 　　Usage: The main predicate; as object; with compliment 　　Source: Qing Zhu Yizun "Song home by Shangqiu" Preface: "seventeen years, the country with extravagant show of thrift, trouble-bound to do, Jane, will be dated to the age, while the case was no longer stay Du." 　　Examples: One should be official, Zhang heard him make a decision. S ~, no unjust prison sentence, great people happy. ★ Ching Huang with "Hong Kingdoms"